Method of spot-dyeing yarn



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8, l T W T m o0 V 6 m@ 1 J. P. GAREY METHOD oF sroT DYEING YARN Filed Apil 8, 1926 ATTORNEY Aus . dye and to stop the spreading at the desired Patented Nov. 23,1926.

-aoHN r. GAREY, or i'arliiriiais.l HEIGHTs-'NEW YORK.

METHOD or s'ro'r-DYEINer,YARN y Application filed April e,

vfore used, including both those which operate upon a .running thread of yarn and those which operate upon a Wound mass of yarn, it has been found' necessary to use alcohol as the vehicle for carrying the coloring matter or dye into the yarn. The dyeing solutions used'have contained `from 33% to 97% oiv alcohol. -The alcohol vehicle has-been found necessary both to cause a spreading of the point so as to leave portions of the yarn .uncolored. .It accomplishes they latter result because of the'rapidity with which it evaporates or dries. All the alcohol used` is thus lost, and the cost of the alcohol has proved to be the largest item of. expense in carrying out these methods of spotting. l

In accordance withr the present invention, the liquid vehicle by means 'of which the dye is carried into lpredetermined parts of i the mass of yarn is removedrom the mass of yarn without removing the dye from the predetermined. parts to-be colored,land con-. sequently Without coloring the parts bf the yarn' which are to be left uncolored. Thea' removal of the vehicle makes it unnecessary to use a vehicle which evaporates rapidly. Theinvention, therefore, makes it possible to. spot yarn by means of a water solution of the dye, the' expense ofwhich is negligible in comparison with that of the alcohol solutions heretofore used. Furthermore, since many'sorts of coloring matter are soluble in water but not vin alcohol, the invention for the first time makes possible the use of such coloring matters in yarn spotting. i

'I-he method which I have invented in- -.volves the following steps First, causing 'a liquid vehicle, such as water containing fia dye, -to penetrate into a wound mass of yarn, bringing the dye into contact with predetermined portions of the mass and leaving the remainder of the mass uncolored, and second, the removal of the liquid vehicle, or the greater-part of it, from the mass by means of centrifugal force without bringin the dye into contact with the portions o the mass which are to be left u`ncolored.

In order that the invention may be clearly i926. Aserial N01 100,487.

understood, I will describe specific methods embodying it, and in such description I shall refer to the accompanying drawings, which show diagrammatically various steps in these specific methods. In the drawings Fig. 1 illustrates the introduction of the dyeing -solution into a cone of yarn in accordance with the method described in Van Ness Patent No. 1,456,344'

Figs. 2, 2a and 3, 3a indicate the parts of the mass which may bedyed in carrying out the present method, Figs. 2 and 3 being axial sections, and Figs. 2a and 3 being side views of a cone of yarn; and

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'-Figs., 4 and 5 illustrate the extractiony of the liquid vehicle from the mass.

In carrying out the method in the manner which I now believe to be most desirable, the coloring matter or dye is suspended, or more desirably dissolved, rin a liquid vehicle, such as hot water. It is desirable, for, reasons hereinafter explained, that the dyein solution should 'contain also a chemical 0 the type known as an assistant to aid the dye in entering the pores of the' yarn. A number of assistants are in use forjthis purpose in various sorts of yarn dyeing, and the exact nature of the assistant used is immaterial so far'as the present invention is concerned. The assistant may consist of a water-soluble oil, such as Turkey-red oil, amounting to about 20% of the-water present in the solution.

' The dyeing solution is then caused to penetrate into a wound mass of yarn, such as a cone of arn, so as to color a band-like por- 4 tion of t e mass lying between twoapproxiextending through the mass. If desired, more than one portion of the mass so bounded may befcolored. The penetration of the dyeing solution is best secured by means of the method and apparatus described in Van Ness Patent No. 1,456,344, and diagrammatically illustrated in F ig. 1, which i shows an injector including a, nozzle and a -water vehicle does not spread as readily y mately parallel, approximately plane surfaces v105. When this method of within the mass. For the same reason, injections are' made. at closely spaced points within the abovefdefined band-like portion of the mass to be dyed, until such portion of the mass has been thoroughly soaked with the dyeing solution. It is usually desirable that several such injections be made simultaneously. The result of the first step is to leave portions of the mass, such as the darker portions' A, A, B illustrated in Figs. 2, 2n and 3, 3n thoroughly soaked with the dyeing solution. Tf a water vehicle is used, the amount of solution injected into the small portions of the cone' of yarn illustrated in Figs. 2, 2a is about equal inweight to the entire cone of yarn.

If the injection lof thedyeing solution has proceeded rapidly so that the portions A, A, or B illustrated 1n Figs. 2, 2", or Figs. 3, 3a, have been saturated with the dyeing solution within a period of a minute or less, it is desirable to wait a short time, for example, about three minutes before ,carrying out the next step of tl e method. This permits the assistant to oplzn the pores of the yarn and allows-the dye to enter these pores.

The-next step of the method consists in extracting from the mass .the greater proportion of the liquid vehicle, that is, the water. This is accomplished by rotatingthe mass rapidly about an axis perpendicular to the surfaces bounding the portions of the mass which have been dyed. Vhen these portions are bounded by approximately plane surfaces approximately perpendicular to the axis of the core of the cone as shown in Fig. 2, the extraction is accomplished by rotating the cone about the axis of its core, for example, by inserting itin a perforated conical casing 10 mounted on a rotary shaft 11, as shown in Fig. 4. The shaft and cone are preferably rotated at a speed of about two thousand revolutions per minute. If the colored portion lies between two planes extending obliquely across the cone, as sho-Wn in Fig. 3, the extraction is accomplished by rotating the cone about an axis perpendicular to these planes, for example, by seating the core of the cone on an inclined support 12 mounted on a rotary plate 13. The inclination and position of the support 12 is such` that the planes bounding the colored portion of the cone are perpendicular to the axis of rotation 14 of the plate 13.

The extraction is continued until the rotating cone ceasesto throw off liquid or mist. This results in leaving the cone substantially dry.

No coloring of the portions of the cone lying outside the predeterminedparts into which the dye was introduced inthe first step of the method takes place during theextraction. This is for two reasons: One is neonazi that, because of the position ofthe axis on which the cone is rotated, the liquid vehicle, in passing out of the cone, travels through the portions of the cone which have been dyed and, therefore, does not carry any of the coloring matter which may be removed with it into other parts of the cone. The other reason is that because of the use of the assistant and the lapse of time permitting the dye to enter the pores of the yarn, very little coloring matter is containedl in the water which is thrown off in the extraction. .Vhile T nd it most desirable to effect the extraction as described so as to make use of both of these factors in preventing the coloring` of the uncolored portions of the cone,

this result may in practice be accomplished with the use of either of t-hese factors alone.

What T claim is titi 1. The method of spotting yarn, which comprises causing a water solution of dye to penetrate into predetermined portions of a wound mass of the yarn, and removing the greater part of the water of the solution from the mass by centrifugal force.

2. The method of spotting yarn, which comprises causing a liquid vehicle carrying i).

a dye to penetrate into a wound mass of yarn bringing the dye into contact with a predetermined portion of the mass, and removing the greater portion of the liquid vehicle,

leaving said predetermined portion colored faces, and thereafter rotating the mass about an axis perpendicular to said surfaces to extract from the masstthe greater part of th liquid vehicle.

4. The method of spotting yarn, which comprises causing a water dyeing solution containing an assistant adapted to open the pores of .the yarn to penetrate into predetermined portions of a wound mass of yarn, permitting the assistant to open the pores of the yarn and the dye to enter the pores, and thereafter removing the' greater part of the water from the mass by centrifugal force.

5. The method of spot-ting yarn, which comprises injecting a hot water dyeing solution into a zone of a wound mass of yarn' extending inwardly to the core of the mass and thereafter extracting the greater' part of the water injected by rotating the mass about the axis of its core. y

In testimony whereof I have hereunto sot my hand.

.roi-na r. casar. 

